package com.concurrent.concurrentTest;

import com.concurrent.annotations.ThreadSafe;
import lombok.extern.slf4j.Slf4j;

import java.util.Map;
import java.util.concurrent.*;

/**
 * @author: zhouyang
 * @descrpition: 内部使用跳表的数据结构实现
 * @time: 2019-05-07 17:35
 */
@Slf4j
@ThreadSafe
public class ConcurrentSkipListMapTest {
    //请求总数
    public static int clientTotal = 5000;

    //请求并行的线程数
    public static int threadTotal = 200;

    private static Map<Integer,Integer> map = new ConcurrentSkipListMap<>();
    //使用了关键字synchronized

    public static void main(String[] args) throws Exception{
        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);//请求总数
        for(int i=0;i<clientTotal;++i){
            final int now = i;
            executorService.execute(()->{
                try {
                    semaphore.acquire();
                    add(now);
                    semaphore.release();
                }catch (Exception e){

                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
        log.info("{}",map.size());
    }

    private static void add(int i){
        map.put(i,i);
    }
}
